The only reason I set movement to the keys instead of joystick is because I'm lazy; bear in mind that it entirely possible to customize and macro-ify any keyboard, mouse and gamepad input with an AutoHotkey script.

Built-in gamepad use for Construct would be cool! If you didn't know, you can change global input keys and their aliases when you click your game name in the project pane; 'controls', at the bottom of its properties window.